Speed figures: Chilukki winner Shred the Gnar leads top 10
Scoring at 5-2 odds, 3-year-old Shred the Gnar not only won the Chilukki Stakes at Churchill Downs. Her triumph also made her the fastest horse racing Saturday, according to Horse Racing Nation speed figures.
The Into Mischief filly earned a 142 HRN figure in the one-mile dirt stakes, securing her third career victory from four starts.
Nation earned a 141 HRN speed figure at Churchill Downs in the ninth race, winning a seven-furlong starter allowance race. The 5-year-old gelding by Constitution won at 6-1 odds in a dominant performance by 6 1-4 lengths, earning his fourth career victory from 12 starts.
Siege of Boston completed the top three with a 139 HRN speed figure at Laurel Park in the fourth race. The 6-year-old horse by War Front won a 1 1-16-mile turf allowance optional claimer at 5-2 odds, recording his fourth career win from 26 starts.
Saturday's top 10 speed figures
| HRN | Horse | Sire | Age | Race | Distance |
|---|---|---|---|---|---|
| 142 | Shred the Gnar | Into Mischief | 3 f | CD 3 | 1 mile dirt |
| 141 | Nation | Constitution | 5 g | CD 9 | 7f dirt |
| 139 | Siege of Boston | War Front | 6 h | LRL 4 | 1 1-16 turf |
| 130 | Next Girl | Divining Rod | 4 f | CD 7 | 1 mile dirt |
| 130 | Playmea Tune | Maclean's Music | 5 g | WO 8 | 7f syn |
| 128 | Blue Kingdom | First Mondays | 4 g | AQU 3 | 7f dirt |
| 128 | Concrete Glory | Bodemeister | 6 g | CD 4 | 6f dirt |
| 128 | Ohana Honor | Honor Code | 5 r | AQU 9 | 1 1-8 turf |
| 127 | Nobals | Noble Mission | 6 g | WO 10 | 6f syn |
| 125 | Logistics | Liam's Map | 4 f | WO 12 | 7f syn |
Fastest maiden winners
Blame Yasself posted the day's highest maiden winner figure with a 121 HRN speed figure at Gulfstream Park. The 2-year-old colt by Blame captured a seven-furlong maiden special weight at 4-1 odds in his debut. He is out of Yass Queen, a Mineshaft mare who earned $2,000, and his top sibling Vino for the Queen by Vino Rosso has earned $23,000.
A Little At First earned a 106 HRN speed figure at Belmont at Aqueduct in a 1 1-16-mile turf maiden special weight. The 2-year-old gelding by War Dancer won at 6-1 odds in his third career start. His dam Brazo de Oro, by First Dude, and his top sibling Twenty Six Black by War Dancer has been Grade 2-placed and earned $627,000.
Project Ace completed the top three maiden winners with a 105 HRN speed figure at Churchill Downs. The 2-year-old colt by War of Will won a 1 1-16-mile maiden special weight at 3-2 odds in his third career start. He is out of Plenty O'Toole, a Tiznow mare who earned $95,000, and his top sibling Mr. Money by Goldencents won a Grade 3 and earned $1.36 million.
Saturday's top maiden winners
| HRN | Horse | Sire | Age | Race | Distance |
|---|---|---|---|---|---|
| 121 | Blame Yasself | Blame | 2 c | GP 8 | 7f dirt |
| 106 | A Little At First | War Dancer | 2 g | AQU 4 | 1 1-16 turf |
| 105 | Project Ace | War of Will | 2 c | CD 1 | 1 1-16 dirt |
| 102 | Shipmate | Mendelssohn | 2 c | GP 6 | 5 1-2 syn |
| 100 | Ginger Zip | Ghostzapper | 3 f | WO 7 | 6 1-2 syn |
| 96 | Likely Story | Charlatan | 2 f | WO 1 | 7f syn |
| 95 | Excuses | Instagrand | 3 c | GP 3 | 1 1-32 syn |
| 92 | Ivy Girl | Maxfield | 2 f | AQU 1 | 1 mile dirt |
| 90 | Japonka | First Samurai | 2 f | WO 6 | 7f syn |
| 88 | Siouxse | Union Rags | 2 f | AQU 10 | 1 1-16 turf |
About HRN speed figures
HRN speed figures are AI-generated using HRN's proprietary machine-learning algorithms. Although they involve less human input than other speed figures, we see that as a plus as human adjustments often knock down surprisingly good performances to match expectations. HRN speed figures were launched in December 2024, and our expectation is also that the AI-generated speed figures will continuously get better over time.
The HRN speed figure scale goes from 1 to 160. Part of the reason for this higher scale is this helps us avoid assigning a speed figure of zero. For some products, in weaker races, half the field or more may get a speed figure of zero, which leads to inaccuracy and defeats the purpose of speed figures.
Because the HRN speed figures are based on machine learning, as we improve our models we can compute the numbers historically.
Using the top last-race speed figure as a benchmark, here are stats from 2021 to 2024 for HRN and other speed-figure providers:
Top HRN figure 26.2% winners
Top Beyer figure 28.1% winners
Top TimeformUS figure 28.4% winners
Although all HRN speed figures are published on individual horse profile pages on a weekly basis, the daily reports are focused on the top and medium-tier tracks, which represent the majority of top speed figures.